These tell you how long you can store food for – with 1 star you can store food for up to a week and with 4 stars, you can freeze food for up to a year. You need a 4-star freezer to freeze fresh food. With anything less you can store only pre-frozen food except with a 1-star freezer, which is suitable only for ice.

Most fridges are cooled using a compressor. This is also known as ‘Vapour-compressor’ cooling. Some fridges are cooled using absorption, which saves electricity by using a source of heat to provide the energy needed to cool the fridge.

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